If you are like me, you are really pissed to have to pay premium prices for ivermectin for dog use, particularly when equine 1.87% ivermectin paste can be bought so cheaply. I have done a lot of research and see no reason why one cannot easily formulate canine ivermectin from equine despite many warnings to the contrary. Ivermectin is ivermectin and all we have to worry about is giving the right dosage. Here is what I did with my scot terrier:
1) I took on tube of Zymecterin horse paste (1.87% ivermectin) formulated to dose horses at 91 mcg/lb body weight. Ivermectin dissolves only in 95% ethanol. it will not in water or a water solution!
2) Push out by the plunger, half a dose of 250 pound weight increment (approx 3 clicks) which will give a dosage for 125 pounds. (125 x 91mcg = 11,375mcg of ivermectrin in this dosage).
3) Place this 125 pound dosage in a glass container and dissolve this 125 pound dose into 100ml of 93%+ ethanol. You can buy this purity of ethanol in Everclear or some similar brand.
4) Once dissolved you will have 100cc = 114mcg per ml. of ivermectin. Calculated by dividing 11,375mcg by 100 ml to get 114 mcg per ml or cc.
5) Canine dosage would be the below. Use an insulin syringe used by diabetics to give these small dosages: Weight----Dose 10 lbs----27.2 micrograms (using my solution, you would give .23cc or ml) 20 lbs----54.4 micrograms (using my solution, you would give .47 cc or ml) 30 lbs----81.6 micrograms 40 lbs----108.8 micrograms 50 lbs----136.0 micrograms 60 lbs----163.2 micrograms 70 lbs----190.4 micrograms 80 lbs----217.6 micrograms 90 lbs----244.8 micrograms 100 lbs--272.0 micrograms
WARNINGS: Some dog breeds should not be given ivermectrin such as collies, old English sheep dogs, etc. Do your homework! Also, if your dog has a heavy heartworm infestation already, it could kill him if given resulting in a sudden die-off, but chances are, it would have died anyway, sooner than later.
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